Sancho was Ole Gunnar Solskjaer's top target throughout the summer transfer window, but the Premier League side failed to land the 20-year-old.
The Red Devils instead signed 18-year-old winger Amad Traore, who joined in a £27million switch from Atalanta, while striker Edinson Cavani had joined on transfer deadline day.United are expected to try again for Sancho next summer, having refused to pay Dortmund's £108million asking price in the Covid-affected market.
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